Revert "arm: config: fix default console only to specify the device"

This reverts commit 232ed3ca534708527a9515c7c41bc3542949525c.

In exynos boards, ${console} is used to set bootargs but it sets
without "console=", so CONFIG_DEFAULT_CONSOLE for these boards is
designated with "console=" but it is removed. So revert the commit.

References for using ${console} in
   board/samsung/common/bootscripts/autoboot.cmd
   board/samsung/common/bootscripts/bootzimg.cmd

Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/include/configs/odroid_xu3.h b/include/configs/odroid_xu3.h
index b44f58e..0337c26 100644
--- a/include/configs/odroid_xu3.h
+++ b/include/configs/odroid_xu3.h
@@ -30,7 +30,7 @@
 
 #define CONFIG_SYS_INIT_SP_ADDR        (CONFIG_SYS_LOAD_ADDR - 0x1000000)
 
-#define CONFIG_DEFAULT_CONSOLE		"ttySAC2,115200n8"
+#define CONFIG_DEFAULT_CONSOLE		"console=ttySAC2,115200n8\0"
 
 /* USB */
 #define CONFIG_USB_EHCI_EXYNOS
@@ -100,7 +100,7 @@
 	MEM_LAYOUT_ENV_SETTINGS \
 	BOOTENV \
 	"rootfstype=ext4\0" \
-	"console=" CONFIG_DEFAULT_CONSOLE "\0"\
+	"console=" CONFIG_DEFAULT_CONSOLE \
 	"fdtfile=exynos5422-odroidxu3.dtb\0" \
 	"boardname=odroidxu3\0" \
 	"mmcbootdev=0\0" \